<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>V-show指令</title>
    <!-- 根据表达值的真假，切换元素的显示和隐藏 -->
</head>

<body>
    <div id="app">
        <input type="button" value="切换显示状态" @click="changeIsShow">
        <input type="button" value="累加年龄" @click="addAge">
        <img v-show="isShow" src="./images/yong.jpg" alt="">
        <img v-show="age>= 18" src="./images/yong.jpg" alt="">
    </div>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el: "#app",
            data: {
                isShow: false,
                age:15
            },
            methods: {
                changeIsShow: function () {
                    this.isShow = !this.isShow;
                },
                addAge:function(){
                    this.age++;
                }
            },
        })
    </script>
</body>

</html>